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Obtaining the minimum value of an input port in noise analysis (Read 1915 times)
sunmus
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Obtaining the minimum value of an input port in noise analysis
Oct 16th, 2015, 4:31am
 
Hi,
     I am trying to write a phase noise model of an integer divider. The input and output ports are of type phase and is accessed using Theta. For example, Theta(out) <+ Theta(in)/ratio.

In the testbench setup for noise analysis, I am giving a flicker+white noise input to the divider. I want to get the white noise (floor) value at the divider's input port (in). how can I get this value and assign it to a real variable inside the divider module ??

I would appreciate if someone can help me asap.

Thanks,
Sunil
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Ken Kundert
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Re: Obtaining the minimum value of an input port in noise analysis
Reply #1 - Oct 18th, 2015, 9:27am
 
You cannot. During a small-signal analysis, the models are evaluated in advance and linearized. They are not active during the small-signal analysis itself.

-Ken
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sunmus
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Re: Obtaining the minimum value of an input port in noise analysis
Reply #2 - Oct 19th, 2015, 10:11am
 
Thanks Ken !
-Sunil
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